Why is a Guru considered more generous than a wish-fulfilling gem, based on the teachings in Chapter 16?

Chapter 16 draws a powerful distinction between the gifts of a Guru and a mythical wish-fulfilling gem, or Chintamani. The text explains that a Chintamani is limited, as it can only bestow what a person thinks of or desires. The Guru's generosity, however, transcends this completely. As Chapter 16 wonderfully states, the Guru gives the "Unthinkable Object," which is Brahman, to his devotee. This illustrates that while a gem can fulfill worldly or conceivable wishes, the Sadguru provides the ultimate, transcendental reality that is beyond the mind's ability to conceive, making him the most generous giver in all three worlds.